Schools are being investigated by the Ombudsman after refusing to answer questions about same-sex couples attending balls.
A teenager lodged the requests for policy information to 431 secondary schools with year 12 and 13 students.
Out of those, 170 schools did not reply, 30 replied with conditions to the request and others asked for administrative costs.
Student Matthew Taylor, 17, was appalled St Patrick's College student Malcolm Pimentel was last year told he couldn't bring his male partner to the ball.
When Taylor contacted St Patrick's he was told the school did not have a policy on same-sex dates.